EP 3067267 A4 20161123 - ICEBREAKER FOR OPERATION PREFERABLY IN SHALLOW FREEZING WATER
Title (en)
ICEBREAKER FOR OPERATION PREFERABLY IN SHALLOW FREEZING WATER
Title (de)
EISBRECHER ZUM BETRIEB VORZUGSWEISE IN FLACHEM GEFRIERENDEM WASSER
Title (fr)
NAVIRE BRISE-GLACE UTILISABLE ESSENTIELLEMENT DANS DES EAUX GELÉES DE FAIBLE PROFONDEUR
Publication
Application
Priority
- RU 2013149585 A 20131106
- RU 2014000277 W 20140416
Abstract (en)
[origin: EP3067267A1] The invention relates to shipbuilding, and more specifically - to the icebreakers and tugboats intended for operation in ice in shallow water conditions. The proposed invention is aimed to improve maneuverability of the ship running both ahead and astern in constrained environment in ice and in open water, as well as to improve its icegoing capabilities and to effectively handle air penetration to the operating AZT propellers and ship propulsors. For this purpose the icebreaker intended for operation preferably in shallow freezing waters comprising a hull with a sled-like stern overhang having flat bottom and ice protection shield along the perimeter of the overhang, and podded propulsion system disposed in the overhang and comprising two side propulsors mounted on the shafts symmetrically to the ship's CL, and arranged with regard to hull height so that the propulsor's tip edges do not protrude beyond the ship's base plane and design waterline at the propellers' location, and, according to the invention, is fitted with two 360-degree azimuth thrusters (AZT) equipped with pulling propellers mounted on the AZT shafts in front of their pods with blade tip edges not protruding beyond the base plane and arranged symmetrically to the ship's CL displaced sternward in such a way that the distance between the disks of AZT propellers and disks of side propulsors is not greater than the diameter of propulsor and the 360-degree turn of azimuth thruster about its axes with no contact to ship's propulsors is provided. In DWL area, the ship's stern overhang is of wedge-type icebreaking shape with 90° - 180° wedge angle along the DWL with its surface being inclined at no less than 30° to the vertical. An ice protection shield with wedge-shape cross section does not protrude beyond the ship's hull and is formed so as to extend in the bow direction beyond the disks plane of ship's side propulsors by the value not greater than two diameters of the above-mentioned propulsors; moreover, it has height at which the lower edge of the shield in the stern protrudes upwards from the rotation axes of AZT propellers at least by half the radius of these propellers. The proposed ship intended for operation in shallow freezing water offers improved maneuverability and icegoing capabilities comparing preferably with prototype.
IPC 8 full level
B63B 35/08 (2006.01); B63H 5/08 (2006.01); B63H 5/125 (2006.01)
CPC (source: EP KR)
B63B 1/08 (2013.01 - EP KR); B63B 35/08 (2013.01 - EP KR); B63B 35/083 (2013.01 - KR); B63H 5/08 (2013.01 - EP KR); B63H 5/125 (2013.01 - EP); B63B 2035/002 (2013.01 - EP); B63H 2005/1254 (2013.01 - EP); Y02T 70/10 (2013.01 - EP)
Citation (search report)
- [A] RU 2268193 C2 20060120
- [A] DE 4208682 A1 19920924 - KVAERNER MASA YARDS OY [FI]
- [A] KR 20120133964 A 20121211
- See references of WO 2015069141A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3067267 A1 20160914; EP 3067267 A4 20161123; EP 3067267 B1 20181128; CN 105829202 A 20160803; CN 105829202 B 20170815; KR 101871885 B1 20180802; KR 20160101907 A 20160826; PL 3067267 T3 20190628; RU 2013149585 A 20150527; RU 2549739 C1 20150427; TR 201902343 T4 20190321; WO 2015069141 A1 20150514
DOCDB simple family (application)
EP 14859632 A 20140416; CN 201480061171 A 20140416; KR 20167015022 A 20140416; PL 14859632 T 20140416; RU 2013149585 A 20131106; RU 2014000277 W 20140416; TR 201902343 T 20140416